The for Bell Holder turns your for into a hidden bike GPS tracking device. Attaches to your bike independently for easy tracking if lost or stolen, or easily track your kids' tracks as they ride around town. Excellent camouflage function, It looks like a regular bicycle bell, so thieves and passersby 't know there's an for hidden! Perfect and unnoticeable. With upgrade of bicycle bell, the sound is not only clear and loud, but also stable. Under normal conditions, the sound level can be between 100-110dB. In extreme situations, it can even reach 120dB for a short time. Even in noisy environments, remains loud and outstanding. Soft and hard pads are included in the package to maximum compatibility. In most cases, hard pads can be used. If the handlebars are too thick for the hard pads, the soft pads can be used. The bike bell is made of high-strength aluminum alloy and plastic, equipped with a powerful spring mechanism. , waterproof, rust-proof, sun-proof and -proof, ensuring a longer service life. Whether it's racing, mountain biking, or classic biking, it's perfect for every challenge. for connects to any nearby iOS device. You don't have to worry about losing/forgetting your bike. Specially designed for all cycling enthusiasts. It's a great way to keep your bike safe and secure. Colour:Black Material:Aluminum alloy + plastic Package Contents: 1 x Bicycle Bell for Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.